Openwrt入门，编译helloworld，生成ipk文件

Openwrt编译helloworld

-----------------by sheepbao

helloworld文件位置放在/openwrt/trunk/package/utils


#-----------------------------------------------------------------------------------------------------------------------

##############################################

# OpenWrt Makefile for HelloWorld program

#

#

# Most of the variables used here are defined in

# the include directives below. We just need to

# specify a basic description of the package,

# where to build our program, where to find

# the source files, and where to install the

# compiled program on the router.

#

# Be very careful of spacing in this file.

# Indents should be tabs, not spaces, and

# there should be no trailing whitespace in

# lines that are not commented.

#

##############################################

include $(TOPDIR)/rules.mk

# Name and release number of this package

PKG_NAME:=helloworld

PKG_RELEASE:=1



# This specifies the directory where we're going to build the program.

# The root build directory, $(BUILD_DIR), is by default the build_mipsel

# directory in your OpenWrt SDK directory

PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)



include $(INCLUDE_DIR)/package.mk



# Specify package information for this program.

# The variables defined here should be self explanatory.

# If you are running Kamikaze, delete the DESCRIPTION

# variable below and uncomment the Kamikaze define

# directive for the description below

define Package/helloworld

         SECTION:=utils

         CATEGORY:=Utilities

         TITLE:=helloworld -- prints a snarky message

endef



# Uncomment portion below for Kamikaze and delete DESCRIPTION variable above

define Package/helloworld/description

         If you can't figure out what this program does, you're probably brain-dead and need immediate medical attention.

endef



# Specify what needs to be done to prepare for building the package.

# In our case, we need to copy the source files to the build directory.

# This is NOT the default. The default uses the PKG_SOURCE_URL and the

# PKG_SOURCE which is not defined here to download the source from the web.

# In order to just build a simple program that we have just written, it is

# much easier to do it this way.

define Build/Prepare

         mkdir -p $(PKG_BUILD_DIR)

         $(CP) ./src/* $(PKG_BUILD_DIR)/

endef



# We do not need to define Build/Configure or Build/Compile directives

# The defaults are appropriate for compiling a simple program such as this one

# Specify where and how to install the program. Since we only have one file,

# the helloworld executable, install it by copying it to the /bin directory on

# the router. The $(1) variable represents the root directory on the router running

# OpenWrt. The $(INSTALL_DIR) variable contains a command to prepare the install

# directory if it does not already exist. Likewise $(INSTALL_BIN) contains the

# command to copy the binary file from its current location (in our case the build

# directory) to the install directory.

define Package/helloworld/install

         $(INSTALL_DIR) $(1)/bin

         $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/bin/

endef



# This line executes the necessary commands to compile our program.

# The above define directives specify all the information needed, but this

# line calls BuildPackage which in turn actually uses this information to

# build a package.

$(eval $(call BuildPackage,helloworld))

#-----------------------------------------------------------------------------------------------------------------------

Src文件夹Makefile的内容：

#-----------------------------------------------------------------------------------------------------------------------

helloworld: helloworld.o

         $(CC) $(LDFLAGS) helloworld.o -o helloworld

helloworld.o: helloworld.c

         $(CC) $(CFLAGS) -c helloworld.c

#-----------------------------------------------------------------------------------------------------------------------

Helloworld.c的内容：

#-----------------------------------------------------------------------------------------------------------------------

#include

#include

int main(void)

{

         printf("hello world\r\n");

         return 0;

}

#-----------------------------------------------------------------------------------------------------------------------

接着make menuconfig

menuconfig.jpg

menuconfig2.jpg

menuconfig3.jpg


退出make menuconfig 执行：make V=99

可看到生成ipk

ipk1.jpg

生成的ipk文件在:bin/x86/package/

ipk2.jpg